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Re: LF: RE: 500 kHz JT4A

To: <[email protected]>
Subject: Re: LF: RE: 500 kHz JT4A
From: "mal hamilton" <[email protected]>
Date: Thu, 28 Jan 2010 10:41:55 -0000
References: <[email protected]> <BF4A524700075746A6467658DFC7102C1284D4B328@ICTS-S-EXC2-CA.luna.kuleuven.be> <[email protected]> <[email protected]> <007f01ca9f96$fbf9bfc0$0217aac0@desktop> <[email protected]> <00a101ca9f9b$182cb1d0$0217aac0@desktop>
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Jim
How do u get 10w out from the 706 on 500 kcs. I can only get a couple of volts into a 50ohm load
mal/g3kiev
 
----- Original Message -----
Sent: Wednesday, January 27, 2010 9:53 PM
Subject: RE: LF: RE: 500 kHz JT4A

Will do!   I am getting several decodes of your ?G4WGT QRZ? call all at around -15dB.   There is another occasional signal on evens but not decoding

 

I am running 10W from ICOM 706 mk2G into inverted L (6m vertical and 30m top hat).    I am assuming (ex Vertload/Tophat2) around  0.5% to 1% eff so ERP between 50mw and 100mW.

 

 

With best regards

 

Jim

 

From: [email protected] [mailto:[email protected]] On Behalf Of Gary - G4WGT
Sent: 27 January 2010 21:44
To: [email protected]
Subject: Re: LF: RE: 500 kHz JT4A

 

Jim,

 

Thanks, getting a weak very trace & the decoder is indicating a signal sync but hardly visible, please keep trying, QSB may bring you up.

 

Gary - G4WGT.

 

2010/1/27 James Cowburn <[email protected]>

Hi Gary

 

Just got two decodes of you at -12dB and -15dB 2116 and 2118.

 

I have replied with my call and locator on odd minute txing

With best regards

 

Jim

 Dr. James Cowburn

E [email protected]

 

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From: [email protected] [mailto:[email protected]] On Behalf Of Gary - G4WGT
Sent: 27 January 2010 21:03
To: [email protected]
Subject: Re: LF: RE: 500 kHz JT4A

 

Rik, & Andy,

 

Thanks for your report & comments & Andy for answering Rik's query.

 

Well there has not been any response to my CQ call so I will change the text to beacon & continue to see if there is a report from further afield.

 

If you want to try for a weak decode I can reduce the power for a short period say 30 minutes, my power is 50 watt RF (200 mW ERP) at the moment so in view of your good report I could take it down to 10 watts RF.

 

Let me know.

 

73, Gary - G4WGT - IO83qo

2010/1/27 Andy Talbot <[email protected]>

-24dB S/N (2.5kHz )  is usually guaranteed


Andy
www.g4jnt.com

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2010/1/27 Rik Strobbe <[email protected]>

 

Gary,

 

solid copy here, SNR -5 to -7dB.

But the signal is clearly audible, CW would be armchair copy.

Any idea down to what SNR values JT4A produces a usable decoding ?

 

73, Rik  ON7YD - OR7T


Van: [email protected] [[email protected]] namens Gary - G4WGT [[email protected]]
Verzonden: woensdag 27 januari 2010 20:33
Aan: Rsgb_Lf_Group
Onderwerp: LF: 500 kHz JT4A

LF,

 

Running JT4A this evening on 503.600 kHz, dial frequency 502.300 kHz USB.

 

73, Gary - G4WGT - IO83qo

 

 

 

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